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Finding the Fourth Proportional to 823.05, 1,136.03 and 649.17

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Solution

The fourth proportional to 823.05, 1,136.03 and 649.17 is: 896.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.05 : 1,136.03 = 649.17 : x
  2. Step 2: Convert to fraction form
    823.05/1,136.03 = 649.17/x
  3. Step 3: Cross multiply
    823.05x = 1,136.03 × 649.17
  4. Step 4: Simplify right side
    823.05x = 737,473.35
  5. Step 5: Solve for x
    x = 737,473.35/823.05
  6. Step 6: Final answer
    x = 896.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.